package chapter03.example01;

class Student {
    String name;
    int age;
    void  read() {
        System.out.println("大家好，我是"+name+",年龄"+age);
    }
}
public class Example02 {
    public  static  void  main (String[] arge){
        Student stu1 = new Student();
        Student stu2 =  null;
        stu2=stu1;
        stu1.name = "小明";
        stu1.age=20;
        stu2.age=50;
        stu1.read();
        stu2.read();
    }
}